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Analog Devices Inc. LTC1418IG#PBF
- Part No.:
- LTC1418IG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1418IG#PBF.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,717
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Product details
Overview
LTC1418IG#PBF from Analog Devices (formerly Linear Technology) is a low-power, 14-bit, 200ksps successive-approximation ADC with selectable parallel or SPI/MICROWIRE-compatible serial output. It operates from single 5V or ±5V supplies, integrates a 2.5V reference and sample-and-hold, and delivers ±1.25LSB INL, 81.5dB S/(N+D), and 15mW typical power dissipation in remote data acquisition and battery-powered instrumentation.
For engineers reviewing the LTC1418IG#PBF datasheet, LTC1418IG#PBF pinout, LTC1418IG#PBF application, or LTC1418IG#PBF equivalent, key selection criteria include unipolar/bipolar input range support (0–4.096V / ±2.048V), dual shutdown modes (Nap/Sleep), differential high-impedance analog inputs, and guaranteed no missing codes over –40°C to +85°C industrial temperature range.
Technical Context
The LTC1418IG#PBF employs a capacitive DAC-based successive approximation architecture with internal timing control and a precision 2.5V reference. Its sample-and-hold acquires input signals in ≤1µs and holds during conversion, enabling accurate sampling of fast-changing analog waveforms up to 100kHz Nyquist frequency.
Digital interface flexibility is implemented via SER/PAR pin selection, supporting either 14-bit parallel bus or serial master/slave operation with SCLK up to 10MHz. Conversion is initiated by CONVST falling edge, with BUSY signaling completion and RD enabling output latching-enabling tight synchronization with microcontrollers and DSPs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes over full temperature range |
| Sampling Rate | 200ksps maximum - supports real-time signal capture at 100kHz Nyquist bandwidth |
| INL / DNL | ±1.25LSB / ±1LSB max - ensures monotonicity and high DC accuracy for precision measurement |
| S/(N + D) | 81.5dB at 97.5kHz - enables >13-bit effective resolution in audio and telecom band applications |
| Power Dissipation | 15mW typical (unipolar) - allows continuous operation in thermally constrained portable systems |
| Analog Input Range | 0V to 4.096V (unipolar) or ±2.048V (bipolar) - matches standard reference voltages and sensor outputs |
| Supply Voltage | +5V (VDD) and 0V or –5V (VSS) - supports single-supply simplicity or bipolar dynamic range |
Pinout & Package
Package: 28-lead plastic SSOP (G package), 5.6mm × 10.2mm body, 0.635mm pitch, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | High-impedance inputs accepting unipolar or bipolar signals; common-mode rejection reduces noise coupling |
| VREF | 2.5V reference output | Stable on-chip voltage source for internal conversion; requires 1µF bypass to AGND |
| REFCOMP | 4.096V reference bypass node | Supports external 4.096V reference configuration; bypassed with 10µF tantalum + 0.1µF ceramic |
| D13–D0 | 14-bit parallel data outputs | Three-state outputs active when CS = LOW and RD = LOW; D13 = MSB |
| SER/PAR | Output format select | LOW = parallel mode; HIGH = serial mode (DOUT, SCLK, CLKOUT, EXTCLKIN active) |
| CONVST | Conversion start trigger | Falling-edge sensitive; initiates SAR cycle and resets internal logic |
| BUSY | Conversion status indicator | Active-low open-drain output signaling ongoing conversion; used for handshaking |
| SHDN, CS | Power management control | SHDN = LOW + CS = LOW → Nap mode (fast wake-up); SHDN = LOW + CS = HIGH → Sleep mode (ultra-low current) |
Key Features
| Feature | Design Value |
|---|---|
| Selectable I/O interface | Hardware-configurable SER/PAR pin enables seamless integration into either parallel-bus microcontrollers or SPI-based embedded systems without redesign |
| Integrated 2.5V reference | Low-drift (±20ppm/°C max) internal reference eliminates need for external precision voltage source, reducing BOM count and layout area |
| Dual shutdown modes | Nap mode (2µA IDD) enables rapid resumption (<500ns wake-up); Sleep mode (0.1µA IDD) extends battery life in dormant sensing intervals |
| Differential input architecture | Rejects common-mode noise on AIN+/AIN– pair, improving immunity in noisy industrial environments and isolated front-ends |
| No missing codes guarantee | Ensures monotonic transfer function across –40°C to +85°C, critical for closed-loop control and safety-critical instrumentation |
Applications
| Remote Data Acquisition | Battery-Operated Systems |
|---|---|
Use Scenario: Distributed environmental monitoring nodes collecting temperature, pressure, and humidity via precision sensors over long cable runs. IC Role / Device Role / Timing Role: Primary analog-to-digital converter acquiring differential sensor outputs with high CMRR and low power consumption. Use Value: 15mW typical dissipation and Sleep mode (0.1µA) enable multi-year operation on coin-cell batteries; ±1.25LSB INL ensures calibrated accuracy without field recalibration. | Use Scenario: Portable medical devices such as handheld ECG recorders requiring clinical-grade signal fidelity and extended runtime. IC Role / Device Role / Timing Role: High-fidelity front-end ADC digitizing low-amplitude biopotential signals with minimal added noise or distortion. Use Value: 81.5dB S/(N+D) at 97.5kHz preserves diagnostic waveform integrity; unipolar 0–4.096V range aligns directly with rail-to-rail op-amp outputs and low-voltage references. |
| Digital Signal Processing | Isolated Data Acquisition Systems |
Use Scenario: Real-time vibration analysis in predictive maintenance systems using MEMS accelerometers sampled at 200ksps. IC Role / Device Role / Timing Role: High-throughput ADC feeding time-domain and FFT-based algorithms in FPGA or DSP subsystems. Use Value: 200ksps sustained rate with deterministic tCONV (3.4–4µs) and BUSY handshake enables precise sample alignment; serial interface simplifies isolation boundary routing. | Use Scenario: High-voltage motor drive monitoring where analog inputs are galvanically isolated from digital control logic. IC Role / Device Role / Timing Role: Isolated-side ADC converting feedback signals (phase current, bus voltage) with minimal latency and jitter. Use Value: Differential inputs reject ground loop noise; 28-lead SSOP footprint accommodates creepage/clearance requirements; Nap mode allows fast response to fault events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit, 200ksps ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8326IPW | 16-bit resolution, 500ksps, SPI-only interface, no internal reference, higher power (12mW @ 50ksps) | Higher resolution required; system already uses external reference and SPI infrastructure | Choose ADS8326IPW when 16-bit precision outweighs power and integration trade-offs |
| MAX1166CCM+ | 14-bit, 250ksps, internal reference, parallel-only interface, wider temp range (–55°C to +125°C), higher INL (±2.5LSB) | Military/aerospace use with extreme temperature exposure and no serial interface requirement | Choose MAX1166CCM+ only if extended temperature rating is mandatory and parallel bus is available |
Compared with ADS8326IPW and MAX1166CCM+, the LTC1418IG#PBF uniquely balances 14-bit accuracy, dual I/O flexibility, integrated reference, and ultra-low power-making it optimal for industrial IoT nodes and portable instrumentation where board space, supply count, and energy efficiency are constrained.
Availability
LTC1418IG#PBF is available at Aetrix Electronics and suitable for remote data acquisition, battery-operated instrumentation, and isolated industrial sensing requiring stable component supply across extended lifecycle programs.
Supply support for LTC1418IG#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1418IG#PBF belongs to ADI's legacy Linear Technology precision data converter portfolio, designed specifically for low-power, high-accuracy measurement systems demanding robust performance across –40°C to +85°C industrial environments.
FAQ
What is the operating temperature range of the LTC1418IG#PBF?
The LTC1418IG#PBF is rated for industrial operation from –40°C to +85°C, as confirmed by its "I" grade designation and Absolute Maximum Ratings table. This range is validated across all key specifications including INL, DNL, S/(N+D), and power consumption-ensuring reliable performance in harsh environments such as factory automation and outdoor telemetry systems. The LTC1418IG#PBF maintains no missing codes and specified dynamic performance throughout this full range.
Does the LTC1418IG#PBF include an internal voltage reference?
Yes, the LTC1418IG#PBF integrates a precision 2.500V ±20ppm/°C (industrial grade) internal reference, accessible at the VREF pin. It can be used directly for unipolar or bipolar conversions, eliminating the need for an external reference in most applications. When higher accuracy or different voltage levels are required, the device also supports external reference configurations via the REFCOMP pin, as detailed in the Applications Information section of the LTC1418IG#PBF datasheet.
How does the LTC1418IG#PBF handle power management in low-power systems?
The LTC1418IG#PBF provides two distinct low-power states: Nap mode (2µA supply current) and Sleep mode (0.1µA). Nap mode retains register state and enables wake-up in under 500ns via CONVST, while Sleep mode minimizes current draw for extended dormancy. Both are controlled jointly by SHDN and CS pins-no external circuitry is needed. This dual-mode capability makes the LTC1418IG#PBF especially suitable for duty-cycled sensor nodes where rapid responsiveness and ultra-low quiescent current must coexist.
Can the LTC1418IG#PBF interface directly with an SPI host controller?
Yes, the LTC1418IG#PBF supports SPI/MICROWIRE-compatible serial communication when SER/PAR is set HIGH. In this mode, D1 (DOUT), D2 (CLKOUT), D3 (SCLK), and D4 (EXTCLKIN) become active serial interface pins. It operates as either master or slave, accepts SCLK frequencies up to 10MHz, and supports standard SPI frame formats-including MSB-first, clock polarity/phase compatibility, and chip-select handshaking via CS and BUSY. No level-shifting or protocol translation is required for direct connection to common microcontrollers.
What is the analog input structure of the LTC1418IG#PBF, and how should it be driven?
The LTC1418IG#PBF features a differential sample-and-hold front-end with high-impedance AIN+ and AIN– inputs. It accepts both differential and single-ended (AIN– grounded) configurations. Driving sources should settle within 1µs after the acquisition spike-achievable with low-output-impedance amplifiers (e.g., LT1357, LT1630) or passive RC filtering. Input leakage is ±1µA, and acquisition time increases with source resistance (e.g., 300ns at 1kΩ, 1µs at 100kΩ), as characterized in Figure 6 of the LTC1418IG#PBF datasheet.
LTC1418IG#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- ±5V, 5V
- Voltage - Supply, Digital:
- ±5V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1418IG#PBF FAQ
1.How can I place an order for LTC1418IG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1418IG#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC1418IG#PBF reliable?
The price and inventory of LTC1418IG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1418IG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1418IG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1418IG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1418IG#PBF?
LTC1418IG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1418IG#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC1418IG#PBF?
For technical support, including LTC1418IG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1418IG#PBF requirements.
6.How does Aetrix verify that LTC1418IG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1418IG#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC1418IG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1418IG#PBF?
All LTC1418IG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1418IG#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC1418IG#PBF part is unused and in its original packaging.
Return procedure for LTC1418IG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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